Cross eyed is where the eyes do not both look straight ahead, but are misaligned so one or both point slightly inward. This can cause a person to have double-vision, since the two images from the eyes are misaligned.
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2

Divergent gaze:
Exotropia (aka divergent gaze) can have a congenital or acquired basis. If it is recent onset a medical evaluation is important to rule out diabetic , hypertensive or other neurologic etiology. An ophthalmic evaluation would be a first and important step. Muscle alingment. Or strabismus surgery can help restore this to straigten eye gaze.
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4

Hard to say:
You need to have the strength of both eyes tested by a skilled eye doctor. You would likely require some assistance with glasses if you squint, and the intermittent nature of your problem needs to be sorted out.Treatment options are best understood when the source of the issue is well defined.
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5

Exercises glasses...:
Glasses may help especially if the rx is high.If you are nearsighted, over corrected lenses may help. If you are far sighted this won't work.If you are very farsighted and your vision is not clear, glasses that improve clarity may help. Convergence exercises can help.These can be done manually or on the computer.Prism glasses may help if you have double vision but can worsen control of exotropia.
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6

Yes, fatigue can :
sometimes worsen esotropia. See an ophthalmologist, an MD who specializes in disorders of the eye, to see if corrective lenses will help. Exotropia must be treated in early childhood to prevent amblyopia with decreased vision in the weaker eye. If the exotropia is of recent onset, you may also need to see a neurologist to determine the cause. Alter your study schedule to get adequate sleep.
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9

Get an exam:
Exotropia is a muscle imbalance that results in the two eyes appearing to look away from one another. Sometimes glasses will help, sometimes surgery can correct the condition.
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Divergent strabismus is a clinical finding in which there is strabismus where the eyes do not have coordinated motion and thus appear "cross-eyed," such that one eye drifts away from the nose (divergent).
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Exotropia, a type of strabismus (commonly referred to as being crossed eyed), is a clinical finding in which the eyes are not aligned on the same target and instead one eye shifts outwardly.
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